A Key West man accused of recording his roommates having sex via a camera taped inside an air vent was arrested Monday.

Edward Raymond Mathis, 49, of Hilton Haven Drive, was charged with sex offense/video voyeurism as well as possession of marijuana and drug paraphernalia. All the charges are misdemeanors.

Officers were called Sunday to Hilton Haven Drive, where a 30-year-old man reported finding a recording device in the air conditioner vent located directly over his and his girlfriend's bed, according to a police incident report and arrest affidavit.

"He said he was lying in his bed and looked up at the AC vent and noticed a flash in the vent," the report states.

The man reportedly removed the vent and found a camera suspended with black tape pointing at the bed.

Police obtained a search warrant for Mathis' bedroom and found a USB wire running from his bedroom, through the attic and into the other unit bedroom where the couple slept, according to the arrest affidavit.

When questioned by police, Mathis reportedly told them that he first installed a web camera in the bathroom vent, but he reportedly "got bored and switched it over to the bedroom."

"I asked Mathis why he changed the positioning of the camera," the affidavit states. "Mathis stated it was somewhat hard to have sex in the bathroom. The USB cable was connected to Mathis' Dell laptop, which was located inside in his bedroom."

Mathis' reportedly admitted to watching the couple having sex and to watching the 26-year-old woman naked in the shower via the camera, according to the affidavit.

Mathis told detectives he downloaded the videos to his computer, but never downloaded the videos to the Internet or made CD copies of the videos, adding that the woman did not know she was being recorded and that she never gave him permission to record her, the affidavit states.